Trap Card - Pay 500 Life Points. Look at your opponent's hand and all Set cards on his/her side of the field.
My favorite card just for it's name, I love to use it in my deck to shock and confuse my enemy, with a loud "I play Mind Haxorz!!", which is usualy followed buy "Mind Haxorz!?"
..but that aside, it's not a terribly bad card, you can see everything your opponent has at the time for the cost of 500 life points, It could certainly help you plan your next few moves, because you now are aware of any dangerous flip effects/traps
and any future monsters/spells/traps, too.
It won't help for any future drawn cards (unless you play Pikeru's Second Sight with Mind Haxorz), but could give you an advantage.
Not too many combos I can think of, except for maybe Mind Crush, allowing you to destroy any card in your opponent's hand (for you now know every card in their hand)
I suppose it would be a 2/5